Answer:
n = 80 / 10, or 8.
Step-by-step explanation:
Everything is on the picture.
The answer is called a linear equation :))
Answer:
Step-by-step explanation:
look at the pictures. they should help.
when you have a triangle and you are trying to find the exterior angle you need to find the interior angle that is opposite of the exterior angle. they should both add up to 180 because it will be on a straight line. what ever numbers you have left should be for both angles.
The coefficient matrix is
Notice that the last row is -4 times the first row, so that the rows of the matrix are not independent. This means the determinant would be 0.
Just to confirm, we can compute the determinant via a Laplace expansion along the first row:
Answer:
154
Step-by-step explanation: